linux-kernel - Re: Loud "pop" coming from hard drive on reboot

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Date:	Tue, 17 Apr 2007 09:00:33 +0200
From:	emisca <emisca.ml@...il.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org
Subject: Re: Loud "pop" coming from hard drive on reboot

2007/4/17, Chuck Ebbert <cebbert@...hat.com>:
> Jan Engelhardt wrote:
> > On Apr 15 2007 12:53, Henrique de Moraes Holschuh wrote:
> >> On Sat, 14 Apr 2007, Pavel Machek wrote:
> >>> How common are notebooks that cut power to disks during reboot?
> >> Assuming it also does this when running Windows, I'd report it as a grave
> >> bug to the vendor and demand it to be fixed, or the machine to be exchanged
> >> with another model that doesn't have this defect.
> >
> > Given that it does not happen on Windows (IIRC Chuck's post),
> > then just what is Windows [not] doing that Linux does?
>
> It looks like there are two problems here:
>
> (1) Some notebooks power off and back on when restarting.
>     Both Linux and other OS handle that badly because they
>     assume power is not interrupted on reboot. The noise
>     emitted is relatively loud.
>

I'm affected by this problem, hp nx7400 + Seagate Momentus 5400.3 160gb SATA

When "drive spins down, acpi_power_off is written on the console, the
drive spins up again, and 3-4 seconds later the notebook is powered
off, leaving disk heads not parked I think.

I've not tried any new kernel or patches. I'm using stock debian Etch
kernel 2.6.18-5-686.
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